U1901 Ford Code - CAN Network No. 2 Communication Bus Fault - Receive Error
Quick Answer
The U1901 Ford diagnostic trouble code indicates a problem with the CAN Network No. Common causes include Faulty CAN network wiring or connectors, Defective CAN module, Software issues with the ECUs. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U1901 Ford indicates CAN Network No. 2 Communication Bus Fault - Receive Error.
- Common causes
- Common causes include Faulty CAN network wiring or connectors, Defective CAN module, Software issues with the ECUs.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code U1901 Ford Description
The U1901 Ford diagnostic trouble code indicates a problem with the CAN Network No. 2 Communication Bus, specifically a receive error. The Controller Area Network (CAN) is a communication protocol used in vehicles to allow various electronic control units (ECUs) to communicate with each other. The CAN network plays a crucial role in transmitting data between different systems in the vehicle, such as the engine control module, transmission control module, ABS module, airbag module, and more.
Common Causes of U1901 Ford
- Faulty CAN network wiring or connectors
- Defective CAN module
- Software issues with the ECUs
- Water or corrosion damage to the CAN bus
- Electrical interference from aftermarket accessories
Symptoms of U1901 Ford
- Check Engine Light illuminated on the dashboard
- Loss of communication with certain vehicle systems (e.g., ABS, airbags)
- Erratic behavior of electronic systems
- Vehicle stalling or difficulty starting
- Reduced fuel efficiency
How to Fix U1901 Ford
- Diagnose the specific module causing the communication error using a professional diagnostic scan tool.
- Inspect the CAN network wiring and connectors for any damage or corrosion, repair or replace as needed.
- Check and update the software of the affected ECUs if necessary.
- Perform a thorough inspection of the vehicle's electrical system to identify and address any potential sources of interference.
- Clear the fault codes and test drive the vehicle to ensure proper communication between modules.
Cost to Fix U1901 Ford
The cost of repairing a U1901 Ford code can vary depending on the exact cause of the issue and the labor rates of the auto repair shop. Typically, the repair cost for this type of communication fault can range from $200 to $500, including parts and labor. However, this is just a rough estimate, and the actual cost may be higher or lower depending on the specific circumstances. It is recommended to consult with a professional mechanic to get a more accurate quote based on the vehicle's make and model, as well as the extent of the repair needed.
Need more information about the U1901 Ford code?
Need more information on how to fix the U1901 Ford code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U1901 Ford code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U1901 Ford Code
1. What does the OBDII code U1901 mean on a Ford vehicle?
The code U1901 indicates a communication fault on the CAN Network No. 2, meaning one or more control modules are not receiving or sending data correctly.
2. What are the common symptoms of a U1901 code in a Ford?
Symptoms may include warning lights on the dashboard, intermittent power loss, failure of certain systems like ABS or traction control, or difficulty starting the vehicle.
3. What causes the U1901 code to appear?
Common causes include a faulty wiring connection, damaged CAN bus wires, a failing control module, or electrical interference from aftermarket accessories.
4. Can a low battery cause the U1901 code?
Yes, a weak or low battery can cause communication errors on the CAN bus, potentially triggering the U1901 code.
5. How do I diagnose the U1901 code on a Ford?
Start by visually inspecting the CAN bus wiring and connections for damage or corrosion, check battery voltage, and use a scan tool to test module communication.
6. Is it safe to drive with a U1901 code active?
Driving may still be possible, but the vehicle could experience erratic behavior or system failures, so it’s best to address the issue promptly.
7. Can a blown fuse cause the U1901 code?
Yes, a blown fuse associated with the CAN bus system or a specific module can lead to a U1901 communication fault.
8. How can I fix the U1901 code on my Ford?
Repairs may involve replacing damaged wiring, reconnecting loose connections, repairing or replacing a faulty module, or reprogramming affected modules.
9. Can a U1901 code clear itself?
The code may clear temporarily if the issue is intermittent, but the underlying problem must be resolved to prevent it from returning.
10. Do I need a professional to fix the U1901 code?
While basic checks like inspecting wires and fuses can be done at home, diagnosing and repairing module or network issues often requires specialized tools and expertise.
Discuss the causes and fixes for U1901 Ford OBDII Code
Code U1901 Ford comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.